CCMSDK explanation

Thanks for the bindings around CCMSDK.
On our side we are experiencing interesting behaviors with it and I'm wondering if you faced such issues too.

Our flow is:
we create multiple CCM instances, each of those is initialized exactly once with a unique name
However it seems like when having at the same time two instances running (but for != application names), each of them gets events for the other one (things get mixed).
Did you ever face this issue?

Last question, could you explain the concept of connectionId ?
While sessionId is pretty clear, connection id isn't. It seems like for a given session you may get multiple connection ids, each time it looks like they are incremented.

Thanks for your help!